CN105896451B - The mutual pull-type lightning stroke trip limiter for reducing electric potential gradient of bipolar electrode - Google Patents
The mutual pull-type lightning stroke trip limiter for reducing electric potential gradient of bipolar electrode Download PDFInfo
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Abstract
本发明涉及一种双电极互拉式降低电位梯度的雷击跳闸限制器，由杆塔横担、绝缘子串及保护间隙机构组成，保护间隙由铁芯、转动轴承金属屏蔽罩、电磁感应线圈、感应线圈平衡强力定位磁铁及空气间隙组成，能够在雷电过电压在保护间隙上下电极间放电形成闪络通道后，利用雷电脉冲产生的电磁动力拉长闪络路径，降低通道电位梯度，进而抑制雷击跳闸率。制作工艺简单，安装方便，可操作性强，成本低廉，能多次经受雷电脉冲放电，具有重复多次使用的特点，适用于大规模推广应用。
The invention relates to a double-electrode mutual pull type lightning strike tripping limiter for reducing the potential gradient, which is composed of a pole tower cross arm, an insulator string and a protection gap mechanism. The protection gap consists of an iron core, a rotating bearing metal shield, an electromagnetic induction coil, and an induction coil Composed of balanced and powerful positioning magnets and air gaps, after the lightning overvoltage discharges between the upper and lower electrodes of the protection gap to form a flashover channel, the electromagnetic power generated by the lightning pulse can be used to lengthen the flashover path, reduce the channel potential gradient, and thereby suppress the lightning tripping rate . The manufacturing process is simple, the installation is convenient, the operability is strong, the cost is low, and it can withstand lightning pulse discharge for many times, has the characteristics of repeated use, and is suitable for large-scale popularization and application.
Description
技术领域technical field
本发明属于输变电工程领域，涉及输电线路装置，尤其是一种双电极互拉式降低电位梯度的雷击跳闸限制器。The invention belongs to the field of power transmission and transformation engineering, and relates to a power transmission line device, in particular to a double-electrode mutual pull type lightning strike trip limiter for reducing potential gradient.
背景技术Background technique
输电线路遭受雷击事故，当雷电过电压大于绝缘子串放电电压时将引起绝缘子串放电闪络，闪络通道若发展成稳定电弧将造成绝缘子串损坏(绝缘子表面烧蚀甚至爆炸)，造成输电线路雷击事故；进而引起继电保护动作于跳闸，消除线路故障，造成输电线路雷击跳闸。When the transmission line is struck by lightning, when the lightning overvoltage is greater than the discharge voltage of the insulator string, the insulator string discharge flashover will be caused. If the flashover channel develops into a stable arc, the insulator string will be damaged (ablation or even explosion on the surface of the insulator), resulting in a lightning strike on the transmission line. Accidents; and then cause relay protection to trip, eliminate line faults, and cause lightning tripping of transmission lines.
雷击跳闸率居于电力系统各类故障跳闸率之首，雷击跳闸率较高严重威胁电力系统安全和可靠供电，抑制雷击跳闸率的关键在于降低闪络通道发展成稳定电弧的概率；闪络通道发展成稳定电弧与闪络路径长度密切相关，拉长闪络路径能大幅度降低雷击跳闸率。因此研制一种能降低雷击跳闸率的装置对于保证电力系统安全和保障可靠供电具有十分重要的意义。The lightning trip rate ranks first in the trip rate of various faults in the power system. The high lightning trip rate seriously threatens the safety and reliable power supply of the power system. The key to suppressing the lightning trip rate is to reduce the probability of the flashover channel developing into a stable arc; the development of the flashover channel The formation of a stable arc is closely related to the length of the flashover path, and elongating the flashover path can greatly reduce the lightning tripping rate. Therefore, it is of great significance to develop a device that can reduce the lightning trip rate to ensure the safety of the power system and ensure reliable power supply.
发明内容Contents of the invention
本发明的目的在于提供一种能在雷电过电压保护间隙上下电极间放电形成闪络通道后，利用雷电脉冲产生的电磁动力拉长闪络路径，降低通道电位梯度，达到抑制雷击跳闸率目的的装置。The purpose of the present invention is to provide a device that can use the electromagnetic power generated by the lightning pulse to elongate the flashover path after the discharge between the upper and lower electrodes in the lightning overvoltage protection gap forms a flashover path, reduce the channel potential gradient, and achieve the purpose of suppressing the lightning tripping rate device.
本发明解决上述技术问题是采取以下技术方案实现的：The present invention solves the above technical problems by taking the following technical solutions:
一种双电极互拉式降低电位梯度的雷击跳闸限制器，由杆塔横担、绝缘子串及保护间隙机构组成，所述绝缘子串的上端通过保护间隙上电极固定金具悬挂在所述杆塔横担上，所述绝缘子串的下端连接保护间隙下电极固定金具，所述保护间隙机构设置在所述保护间隙上电极固定金具和保护间隙下电极固定金具之间。A double-electrode mutual pull type lightning tripping limiter for reducing the potential gradient, consisting of a tower cross arm, an insulator string and a protection gap mechanism, the upper end of the insulator string is suspended on the pole tower cross arm through the upper electrode fixing hardware of the protection gap , the lower end of the insulator string is connected to the lower electrode fixing hardware of the protection gap, and the protection gap mechanism is arranged between the upper electrode fixing hardware of the protection gap and the lower electrode fixing hardware of the protection gap.
而且，所述的保护间隙机构包括绝缘支架、金属托架、铁芯、转动轴承金属屏蔽罩、电磁感应线圈、感应线圈平衡强力定位磁铁及空气间隙组成，所述转动轴承金属屏蔽罩包括上电极转动轴承金属屏蔽罩和下电极转动轴承金属屏蔽罩，电磁感应线圈包括上电极电磁感应线圈和下电极电磁感应线圈、感应线圈平衡强力定位磁铁包括上电极感应线圈平衡强力定位磁铁和下电极感应线圈平衡强力定位磁铁。Moreover, the protective gap mechanism includes an insulating support, a metal bracket, an iron core, a metal shielding cover for the rotating bearing, an electromagnetic induction coil, a balanced powerful positioning magnet for the induction coil, and an air gap. The metal shielding cover for the rotating bearing includes an upper electrode Rotating bearing metal shielding cover and lower electrode rotating bearing metal shielding cover, electromagnetic induction coil includes upper electrode electromagnetic induction coil and lower electrode electromagnetic induction coil, induction coil balanced powerful positioning magnet includes upper electrode induction coil balanced powerful positioning magnet and lower electrode induction coil Balanced strong positioning magnets.
而且，所述绝缘支架上端与焊接在所述保护间隙上电极固定金具上的上电极金属部分固定连接，所述绝缘支架下端设置有所述铁芯，所述金属托架设置在所述绝缘支架上，在该金属支架的对应侧面对称设置有两个感应线圈平衡强力定位磁铁绝缘支架，所述上电极感应线圈平衡强力定位磁铁设置在上感应线圈平衡强力定位磁铁绝缘支架上，所述下电极感应线圈平衡强力定位磁铁设置在下感应线圈平衡强力定位磁铁绝缘支架上。Moreover, the upper end of the insulating support is fixedly connected with the metal part of the upper electrode welded on the upper electrode fixing hardware of the protection gap, the lower end of the insulating support is provided with the iron core, and the metal bracket is arranged on the insulating support On the corresponding side of the metal support, there are two induction coil balance strong positioning magnet insulation supports symmetrically, the upper electrode induction coil balance strong positioning magnet is arranged on the upper induction coil balance strong positioning magnet insulation support, and the lower electrode The induction coil balance strong positioning magnet is arranged on the lower induction coil balance strong positioning magnet insulating support.
而且，所述上电极转动轴承金属屏蔽罩由转动轴承和两个金属屏蔽罩组成，所述转动轴承设置在中央，该转动轴承的两端对称设置有左金属屏蔽罩和右金属屏蔽罩，上电极绝缘部分固定在该上电极转动轴承的两端，所述左金属屏蔽罩连接上电极金属部分，所述右金属屏蔽罩连接所述上电极绝缘部分，该右金属屏蔽罩的上端开口半径大于所述上电极绝缘部分的半径，以保证能自由转动，所述下电极转动轴承金属屏蔽罩结构与上电极转动轴承金属屏蔽罩相同，下电极绝缘部分固定在该下电极转动轴承的两端，所述下电极转动轴承的左金属屏蔽罩连接下电极金属部分，所述下电极转动轴承的右金属屏蔽罩连接所述下电极绝缘部分，该下电极转动轴承的右金属屏蔽罩的上端开口半径大于所述下电极绝缘部分的半径。Moreover, the metal shield of the upper electrode rotating bearing is composed of a rotating bearing and two metal shields, the rotating bearing is arranged in the center, and a left metal shield and a right metal shield are symmetrically arranged at both ends of the rotating bearing, and the upper The electrode insulation part is fixed on both ends of the upper electrode rotating bearing, the left metal shield is connected to the metal part of the upper electrode, the right metal shield is connected to the upper electrode insulation part, and the opening radius of the upper end of the right metal shield is larger than The radius of the insulating part of the upper electrode is to ensure free rotation. The structure of the metal shielding cover of the rotating bearing of the lower electrode is the same as that of the rotating bearing of the upper electrode. The insulating part of the lower electrode is fixed at both ends of the rotating bearing of the lower electrode. The left metal shield of the lower electrode rotating bearing is connected to the metal part of the lower electrode, the right metal shield of the lower electrode rotating bearing is connected to the lower electrode insulating part, and the upper end opening radius of the right metal shield of the lower electrode rotating bearing is greater than the radius of the insulating part of the lower electrode.
而且，所述上电极绝缘部分的右侧连接所述上电极电磁感应线圈，该上电极电磁感应线圈内对称设置有上电极电磁感应线圈平衡用铁块，所述上电极电磁感应线圈的另一端通过上电极金属部分与连接碳刷连接，在该连接碳刷上设置有金属球，所述下电极绝缘部分的右侧连接所述下电极电磁感应线圈，该下电极电磁感应线圈内对称设置有下电极感应线圈平衡用铁块，所述上电磁感应线圈的另一端连接保护间隙下电极。Moreover, the right side of the insulating part of the upper electrode is connected to the upper electrode electromagnetic induction coil, and iron blocks for balancing the upper electrode electromagnetic induction coil are symmetrically arranged in the upper electrode electromagnetic induction coil, and the other end of the upper electrode electromagnetic induction coil The metal part of the upper electrode is connected to the connecting carbon brush, and a metal ball is arranged on the connecting carbon brush. The right side of the insulating part of the lower electrode is connected to the lower electrode electromagnetic induction coil, and the electromagnetic induction coil of the lower electrode is symmetrically arranged with An iron block is used for balancing the induction coil of the lower electrode, and the other end of the upper electromagnetic induction coil is connected to the lower electrode of the protection gap.
而且，绝缘导线一端连接所述上电极金属部分，缠绕过所述铁芯，穿过所述金属托架与所述金属球连接，从所述金属球引出的保护间隙上电极连接所述空气间隙一端，该空气间隙的另一端连接所述保护间隙下电极，该保护间隙下电极通过下电极电磁感应线圈和下电极转动轴承连接至焊接在保护间隙下电极固定金具的下电极金属部分上，该保护间隙下电极固定金具的另一端引出导线。Moreover, one end of the insulated wire is connected to the metal part of the upper electrode, wound around the iron core, passed through the metal bracket and connected to the metal ball, and the upper electrode of the protective gap drawn from the metal ball is connected to the air gap One end, the other end of the air gap is connected to the lower electrode of the protective gap, and the lower electrode of the protective gap is connected to the metal part of the lower electrode welded on the lower electrode fixing hardware of the protective gap through the electromagnetic induction coil of the lower electrode and the rotating bearing of the lower electrode. The other end of the electrode fixing hardware under the protection gap leads out the wire.
而且，所述上电极感应线圈平衡强力定位磁铁在两块所述上电极感应线圈平衡用铁块中垂线上，且与两块所述上电极感应线圈平衡用铁块中点的距离大于所述上电极电磁感应线圈的宽度；所述下电极感应线圈平衡强力定位磁铁在两块所述下电极感应线圈平衡用铁块中垂线上，且与两块所述下电极感应线圈平衡用铁块中点的距离大于所述下电极电磁感应线圈的宽度。Moreover, the upper electrode induction coil balance powerful positioning magnet is on the vertical line between the two iron blocks for balancing the upper electrode induction coil, and the distance from the midpoint of the two iron blocks for balancing the upper electrode induction coil is greater than the The width of the above-mentioned upper electrode electromagnetic induction coil; the balanced powerful positioning magnet of the lower electrode induction coil is on the vertical line of the two iron blocks for the balance of the lower electrode induction coil, and is connected with the two iron blocks for the balance of the lower electrode induction coil. The distance between the block midpoints is greater than the width of the lower electrode electromagnetic induction coil.
而且，所述装置主体结构采用φ14镀锌圆钢和环氧树脂绝缘棒，连接部分用φ14膨胀螺栓固定。Moreover, the main structure of the device adopts φ14 galvanized round steel and epoxy resin insulating rods, and the connection part is fixed with φ14 expansion bolts.
而且，所述保护间隙上电极与保护间隙下电极之间的距离为所述绝缘子串的85％，即将绝缘子串短接15％。Moreover, the distance between the guard gap upper electrode and the guard gap lower electrode is 85% of the insulator string, Short-circuit the insulator string by 15%.
本发明的优点和有益效果为：Advantage of the present invention and beneficial effect are:
1、本发明在绝缘子串的两端并联安装保护间隙机构，且保证正确的绝缘配合，在实验室条件下，进行放电试验，确保并联保护间隙优先放电；在污秽、潮湿等恶劣条件下，进行放电试验，确保并联保护间隙具有一定概率优先放电。通过电磁感应线圈、感应线圈平衡强力定位磁铁及空气间隙的设置有效地拉长闪络路径，避免闪络通道发展成稳定电弧，降低闪络通道发展成稳定电弧的概率，大幅度降低雷击跳闸率，保证了供电的稳定性。1. The present invention installs protective gap mechanisms in parallel at both ends of the insulator string, and ensures correct insulation coordination. Under laboratory conditions, discharge tests are carried out to ensure that the parallel protective gaps are discharged preferentially; under harsh conditions such as pollution and humidity, carry out Discharge test to ensure that the parallel protection gap has a certain probability of preferential discharge. Through the setting of electromagnetic induction coil, induction coil balance powerful positioning magnet and air gap, the flashover path can be effectively lengthened to prevent the flashover channel from developing into a stable arc, reduce the probability of the flashover channel developing into a stable arc, and greatly reduce the lightning tripping rate , to ensure the stability of the power supply.
2、本发明构建了一种新型的具有拉长绝缘子闪络路径的并联保护间隙，并联保护间隙上下电极间距离为绝缘子串的85％(即将绝缘子串短接15％)，当雷电过电压施加于绝缘子串两端时，由于并联保护间隙放电电压低于绝缘子串，若雷电过电压超过间隙放电电压，保护间隙放电，形成闪络通道，保护了绝缘子串，避免了绝缘子表面烧蚀甚至爆炸。2. The present invention constructs a novel parallel protection gap with an elongated insulator flashover path, and the distance between the upper and lower electrodes of the parallel protection gap is 85% of the insulator string ( That is, the insulator strings are short-circuited by 15%). When the lightning overvoltage is applied to both ends of the insulator strings, since the discharge voltage of the parallel protection gap is lower than that of the insulator strings, if the lightning overvoltage exceeds the gap discharge voltage, the protection gap discharges and a flashover channel is formed. The insulator string is protected, and the ablation or even explosion of the insulator surface is avoided.
3、闪络通道形成后在工频电压作用下，将形成工频短路电弧，引发系统故障。闪络通道形成工频短路电弧的概率与通道电位梯度(工频电压幅值比间隙距离)正相关。本发明的装置能在雷电过电压在保护间隙上下电极间放电形成闪络通道后，利用雷电脉冲产生的电磁动力拉长闪络路径，降低通道电位梯度，进而抑制雷击跳闸率。3. After the flashover channel is formed, under the action of power frequency voltage, a power frequency short-circuit arc will be formed, causing system failure. The probability of forming a power frequency short-circuit arc in a flashover channel is positively correlated with the channel potential gradient (power frequency voltage amplitude ratio to gap distance). The device of the invention can use the electromagnetic power generated by the lightning pulse to elongate the flashover path after the lightning overvoltage discharges between the upper and lower electrodes of the protection gap to elongate the flashover path, reduce the channel potential gradient, and further suppress the lightning tripping rate.
4、本发明制作工艺简单，安装方便，可操作性强，成本低廉，能多次经受雷电脉冲放电，具有重复多次使用的特点，能有效拉长雷电放电闪络通道，具有大幅降低雷击跳闸率功能，适用于大规模推广应用。4. The invention has simple manufacturing process, convenient installation, strong operability, low cost, can withstand lightning pulse discharge for many times, has the characteristics of repeated use, can effectively lengthen the lightning discharge flashover channel, and can greatly reduce lightning tripping The rate function is suitable for large-scale promotion and application.
附图说明Description of drawings
图1为本发明的结构示意图。Fig. 1 is a structural schematic diagram of the present invention.
具体实施方式Detailed ways
下面通过具体实施例对本发明作进一步详述，以下实施例只是描述性的，不是限定性的，不能以此限定本发明的保护范围。The present invention will be further described in detail below through the specific examples, the following examples are only descriptive, not restrictive, and cannot limit the protection scope of the present invention with this.
一种双电极互拉式降低电位梯度的雷击跳闸限制器，由杆塔横担1、绝缘子串28(不同电压等级片数不同)及保护间隙机构组成，所述绝缘子串的上端通过保护间隙上电极固定金具2悬挂在所述杆塔横担上，所述绝缘子串的下端连接保护间隙下电极固定金具26；所述保护间隙机构设置在所述保护间隙上电极固定金具和保护间隙下电极固定金具之间。A double-electrode mutual pull type lightning strike tripping limiter for reducing the potential gradient, which is composed of a pole tower cross arm 1, an insulator string 28 (the number of pieces is different for different voltage levels) and a protective gap mechanism. The upper end of the insulator string passes through the upper electrode of the protective gap. The fixing hardware 2 is suspended on the cross arm of the pole tower, and the lower end of the insulator string is connected to the lower electrode fixing hardware 26 of the protective gap; the protective gap mechanism is arranged between the upper electrode fixing hardware of the protective gap and the lower electrode fixing hardware of the protective gap. between.
所述的保护间隙机构包括绝缘支架7、金属托架16、铁芯18、转动轴承金属屏蔽罩、电磁感应线圈、感应线圈平衡强力定位磁铁及空气间隙19组成。所述转动轴承金属屏蔽罩包括上电极转动轴承金属屏蔽罩5和下电极转动轴承金属屏蔽罩24，电磁感应线圈包括上电极电磁感应线圈9和下电极电磁感应线圈 21、感应线圈平衡强力定位磁铁包括上电极感应线圈平衡强力定位磁铁14和下电极感应线圈平衡强力定位磁铁17。The protective gap mechanism includes an insulating support 7, a metal bracket 16, an iron core 18, a metal shield cover for a rotating bearing, an electromagnetic induction coil, an induction coil balance powerful positioning magnet and an air gap 19. Described rotating bearing metal shielding cover comprises upper electrode rotating bearing metal shielding cover 5 and lower electrode rotating bearing metal shielding cover 24, and electromagnetic induction coil comprises upper electrode electromagnetic induction coil 9 and lower electrode electromagnetic induction coil 21, induction coil balance powerful positioning magnet It includes an upper electrode induction coil balance strong positioning magnet 14 and a lower electrode induction coil balance strong positioning magnet 17.
所述绝缘支架上端与焊接在所述保护间隙上电极固定金具上的上电极金属部分4固定连接，所述绝缘支架下端设置有所述铁芯，所述金属托架设置在所述绝缘支架上，在该金属支架的对应侧面对称设置有两个感应线圈平衡强力定位磁铁绝缘支架15，所述上电极感应线圈平衡强力定位磁铁设置在上感应线圈平衡强力定位磁铁绝缘支架上，所述下电极感应线圈平衡强力定位磁铁设置在下感应线圈平衡强力定位磁铁绝缘支架上。The upper end of the insulating support is fixedly connected with the upper electrode metal part 4 welded on the upper electrode fixing hardware of the protection gap, the lower end of the insulating support is provided with the iron core, and the metal bracket is arranged on the insulating support On the corresponding side of the metal bracket, two induction coil balance strong positioning magnet insulating supports 15 are symmetrically arranged, and the upper electrode induction coil balance strong positioning magnet is arranged on the upper induction coil balance strong positioning magnet insulating support, and the lower electrode The induction coil balance strong positioning magnet is arranged on the lower induction coil balance strong positioning magnet insulating support.
所述上电极转动轴承金属屏蔽罩由转动轴承和两个金属屏蔽罩组成，所述转动轴承设置在中央，该转动轴承的两端对称设置有左金属屏蔽罩和右金属屏蔽罩，在所述上电极转动轴承的两端固定上电极绝缘部分6，所述左金属屏蔽罩连接上电极金属部分，所述右金属屏蔽罩连接所述上电极绝缘部分，该右金属屏蔽罩的上端开口半径大于所述上电极绝缘部分的半径，以保证能自由转动。所述下电极转动轴承金属屏蔽罩结构与上电极转动轴承金属屏蔽罩相同，在所述下电极转动轴承的两端固定下电极绝缘部分23，所述下电极转动轴承的左金属屏蔽罩连接下电极金属部分，所述下电极转动轴承的右金属屏蔽罩连接所述下电极绝缘部分，该下电极转动轴承的右金属屏蔽罩的上端开口半径大于所述下电极绝缘部分的半径。The metal shielding cover of the upper electrode rotating bearing is composed of a rotating bearing and two metal shielding covers. The upper electrode insulating part 6 is fixed at both ends of the rotating bearing of the upper electrode, the left metal shield is connected to the metal part of the upper electrode, the right metal shield is connected to the upper electrode insulating part, and the opening radius of the upper end of the right metal shield is larger than The radius of the insulating part of the upper electrode is to ensure free rotation. The structure of the metal shield of the lower electrode rotating bearing is the same as that of the upper electrode rotating bearing. The lower electrode insulating part 23 is fixed at both ends of the lower electrode rotating bearing, and the left metal shield of the lower electrode rotating bearing is connected to the lower electrode rotating bearing. The electrode metal part, the right metal shield of the lower electrode rotating bearing is connected to the lower electrode insulating part, and the upper end opening radius of the right metal shield of the lower electrode rotating bearing is larger than the radius of the lower electrode insulating part.
所述上电极绝缘部分的右侧连接所述上电极电磁感应线圈，该上电极电磁感应线圈内对称设置有上电极电磁感应线圈平衡用铁块8。所述上电极电磁感应线圈的另一端通过上电极金属部分10与连接碳刷12连接，在该连接碳刷上设置有金属球11。所述下电极绝缘部分的右侧连接所述下电极电磁感应线圈，该下电极电磁感应线圈内对称设置有下电极感应线圈平衡用铁块22。所述上电磁感应线圈的另一端连接保护间隙下电极20。The right side of the insulating part of the upper electrode is connected to the electromagnetic induction coil of the upper electrode, and an iron block 8 for balancing the electromagnetic induction coil of the upper electrode is arranged symmetrically inside the electromagnetic induction coil of the upper electrode. The other end of the upper electrode electromagnetic induction coil is connected to the connection carbon brush 12 through the upper electrode metal part 10, and a metal ball 11 is arranged on the connection carbon brush. The right side of the insulating part of the lower electrode is connected to the electromagnetic induction coil of the lower electrode, and an iron block 22 for balancing the induction coil of the lower electrode is symmetrically arranged in the electromagnetic induction coil of the lower electrode. The other end of the upper electromagnetic induction coil is connected to the lower electrode 20 of the protection gap.
绝缘导线3一端连接所述上电极金属部分，缠绕过所述铁芯，穿过所述金属托架与所述金属球连接。从所述金属球引出的保护间隙上电极13连接所述空气间隙一端，该空气间隙的另一端连接所述保护间隙下电极，该保护间隙下电极通过下电极电磁感应线圈和下电极转动轴承连接至焊接在保护间隙下电极固定金具的下电极金属部分25上，该保护间隙下电极固定金具的另一端引出导线27。One end of the insulated wire 3 is connected to the metal part of the upper electrode, wound around the iron core, passed through the metal bracket and connected to the metal ball. The upper electrode 13 of the protective gap drawn from the metal ball is connected to one end of the air gap, and the other end of the air gap is connected to the lower electrode of the protective gap, and the lower electrode of the protective gap is connected by the electromagnetic induction coil of the lower electrode and the rotating bearing of the lower electrode To be welded on the lower electrode metal part 25 of the lower electrode fixing fitting in the protection gap, the other end of the lower electrode fixing fitting in the protection gap leads out the wire 27 .
所述上电极感应线圈平衡强力定位磁铁在两块所述上电极感应线圈平衡用铁块中垂线上，且与两块所述上电极感应线圈平衡用铁块中点的距离大于所述上电极电磁感应线圈的宽度；所述下电极感应线圈平衡强力定位磁铁在两块所述下电极感应线圈平衡用铁块中垂线上，且与两块所述下电极感应线圈平衡用铁块中点的距离大于所述下电极电磁感应线圈的宽度。The upper electrode induction coil balance powerful positioning magnet is on the vertical line between the two iron blocks for balancing the upper electrode induction coil, and the distance from the midpoint of the two iron blocks for balancing the upper electrode induction coil is greater than that of the upper electrode induction coil. The width of the electrode electromagnetic induction coil; the balance of the lower electrode induction coil and the powerful positioning magnet are on the vertical line between the two iron blocks for the balance of the lower electrode induction coil, and in the two iron blocks for the balance of the lower electrode induction coil The distance between the points is greater than the width of the electromagnetic induction coil of the lower electrode.
所述装置主体结构采用φ14镀锌圆钢和环氧树脂绝缘棒，连接部分用φ14 膨胀螺栓固定。The main structure of the device adopts φ14 galvanized round steel and epoxy resin insulating rods, and the connection part is fixed with φ14 expansion bolts.
所述保护间隙上电极与保护间隙下电极之间的距离为所述绝缘子串的85％，即将绝缘子串短接15％。The distance between the guard gap upper electrode and the guard gap lower electrode is 85% of the insulator string, Short-circuit the insulator string by 15%.
本发明的工作原理：Working principle of the present invention:
当发生雷电雷击避雷线或杆塔时，雷电脉冲经流以下途径完成横担对导线放电过程：When lightning strikes the lightning protection line or tower, the lightning pulse flows through the following ways to complete the discharge process of the crossarm to the conductor:
1→2→4→3→16→12→11→10→19→20→21→24→26→27；1→2→4→3→16→12→11→10→19→20→21→24→26→27;
当发生雷击导线时，雷电脉冲经流以下途径完成导线对横担放电过程：When lightning strikes the conductor, the lightning pulse flows through the following ways to complete the discharge process of the conductor to the crossarm:
27→26→24→21→20→19→10→11→12→16→3→4→2→1。27→26→24→21→20→19→10→11→12→16→3→4→2→1.
在上述两过程中，雷电脉冲通过绕在铁芯上的绝缘导线产生巨变磁场，感应线圈产生巨大扭矩，克服感应线圈强力定位磁铁力，带动保护间隙上电极与保护间隙下电极部分扭转，拉长了雷电放电闪络路径，抑制了闪络通道转化为工频电弧的概率，降低了雷击跳闸率；雷电脉冲过后，扭转的上电极电磁感应线圈在上电极感应线圈平衡用铁块、上电极感应线圈平衡强力定位磁铁产生的磁力作用下恢复平衡，扭转的下电极电磁感应线圈在下电极感应线圈平衡用铁块、下电极感应线圈平衡强力定位磁铁产生的磁力作用下恢复平衡，确保合理的绝缘配合。In the above two processes, the lightning pulse generates a huge magnetic field change through the insulated wire wound on the iron core, and the induction coil generates a huge torque, which overcomes the strong positioning magnet force of the induction coil, and drives the upper electrode of the protection gap and the lower electrode of the protection gap to twist and elongate The lightning discharge flashover path is suppressed, the probability of the flashover channel being transformed into a power frequency arc is suppressed, and the lightning tripping rate is reduced; Coil balance The balance is restored under the magnetic force generated by the powerful positioning magnet, and the twisted lower electrode electromagnetic induction coil is restored to balance under the magnetic force generated by the iron block for the lower electrode induction coil balance and the magnetic force generated by the lower electrode induction coil balance strong positioning magnet to ensure reasonable insulation coordination. .
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